Lexus ES: Sensor (Motor) Failure (Fr Shade) (B2347,B2349)
DESCRIPTION
When the roof sunshade ECU (sliding roof drive gear assembly) detects a motor malfunction and the sliding roof operation is stopped, DTC B2347 is stored.
When the roof sunshade ECU (sliding roof drive gear assembly) detects a gear position malfunction and the sliding roof operation is stopped, DTC B2349 is stored.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B2347 | Sensor (Motor) Failure (Fr Shade) | Sensor (motor) failure (When the roof sunshade ECU (sliding roof drive gear assembly) enters fail-safe mode due to a problem with the motor) |
|
| B2349 | Position Failure (Fr Shade) | Position failure (When the roof sunshade ECU (sliding roof drive gear assembly) enters fail-safe mode due to a problem with the gear position) |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
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When the roof sunshade ECU (sliding roof drive gear assembly) is removed and reinstalled or replaced, the roof sunshade ECU (sliding roof drive gear assembly) must be initialized.
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The panoramic moon roof system uses the CAN and LIN communication system. First, confirm that there are no malfunctions in the CAN and LIN communication system. Refer to How to Proceed with Troubleshooting.
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PROCEDURE
| 1. | CHECK ROOF SUNSHADE OPERATION |
(a) Check the roof sunshade auto operation function.
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OK:
Auto operation function operates normally.
| NG | .gif) | GO TO STEP 3 |
|
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| 2. | CHECK DTC OUTPUT |
(a) Clear the DTCs.
Body Electrical > Sliding Roof > Clear DTCs(b) Check for DTCs.
Body Electrical > Sliding Roof > Trouble CodesOK:
DTCs B2341 and B2344 are not output.
| OK | | USE SIMULATION METHOD TO CHECK |
| NG | | REPLACE ROOF SUNSHADE ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY) |
| 3. | INITIALIZE ROOF SUNSHADE ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY) |
(a) Check that the roof sunshade ECU (sliding roof drive gear assembly) can be initialized.
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OK:
Roof sunshade ECU (sliding roof drive gear assembly) can be initialized.
| NG | | GO TO STEP 5 |
|
| 4. | CHECK DTC OUTPUT |
(a) Clear the DTCs.
Body Electrical > Sliding Roof > Clear DTCs(b) Check for DTCs.
Body Electrical > Sliding Roof > Trouble CodesOK:
DTCs B2341 and B2344 are not output.
| OK | | END (MALFUNCTION DUE TO INITIALIZATION FAILURE) |
| NG | | REPLACE ROOF SUNSHADE ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY) |
| 5. | READ VALUE USING TECHSTREAM (SLIDING ROOF) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Sliding Roof / Data List.
(e) Read the Data List according to the display on the Techstream.
Body Electrical > Sliding Roof > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Up Switch | Roof sunshade close switch signal | OFF or ON | OFF: Roof sunshade switch not slid forward ON: Roof sunshade switch slid forward | - |
| Down Switch | Roof sunshade open switch signal | OFF or ON | OFF: Roof sunshade switch not slid backward ON: Roof sunshade switch slid backward | - |
| Tester Display |
|---|
| Up Switch |
| Down Switch |
OK:
OFF appears on the Techstream screen.
| OK | | REPLACE ROOF SUNSHADE ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY) |
|
| 6. | CHECK HARNESS AND CONNECTOR (ROOF SUNSHADE ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY) - PANORAMIC MOON ROOF SWITCH (MAP LIGHT SUB-ASSEMBLY) AND BODY GROUND) |
(a) Disconnect the P13 panoramic moon roof switch (map light sub-assembl) connector.
(b) Disconnect the Q1 sliding roof ECU (sliding roof drive gear assembly) connector.
(c) Disconnect the Q2 roof sunshade ECU (sliding roof drive gear assembly) connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| Q1-9 (CLS) - P13-24 (DOWN) | Always | Below 1 Ω |
| Q1-9 (CLS) or P13-24 (DOWN) - Body ground | Always | 10 kΩ or higher |
| Q1-5 (OPN) - P13-23 (UP) | Always | Below 1 Ω |
| Q1-5 (OPN) or P13-23 (UP) - Body ground | Always | 10 kΩ or higher |
| Q1-2 (E) - Body ground | Always | Below 1 Ω |
| P13-19 (GND) - Body ground | Always | Below 1 Ω |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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| 7. | INSPECT PANORAMIC MOON ROOF SWITCH (MAP LIGHT SUB-ASSEMBLY) |
(a) Remove the panoramic moon roof switch (map light sub-assembl).
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(b) Inspect the panoramic moon roof switch (map light sub-assembl).
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| OK | | REPLACE ROOF SUNSHADE ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY) |
| NG | | REPLACE PANORAMIC MOON ROOF SWITCH (MAP LIGHT SUB-ASSEMBLY) |
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Data List / Active Test
DATA LIST / ACTIVE TEST DATA LIST NOTICE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not. HINT: Using the Techstream to read the Data List allows the values or states of
